VOLVO
ECM-P057187 - Brake Switch A Circuit. Bus Signal / Message Failures. Bus off
System
Engine Control Module (ECM)
Volvo models this fault code applies to
Applies to the following models:
3 modelsS60 (2011–), S80 (2007–), V70 (2008–)
Show models by year and engine (9)
- Volvo S60 (2011–)2011–2012Engine B5254T5 only
- Volvo S80 (2007–)2007–2008Engine B5254T6 only
- Volvo S80 (2007–)2009Engine B5254T6, B5254T8 only
- Volvo S80 (2007–)2010–2011Engine B5254T10, B5254T11, B5254T8 only
- Volvo S80 (2007–)2012Engine B5254T10 only
- Volvo V70 (2008–)2008Engine B5254T6 only
- Volvo V70 (2008–)2009Engine B5254T6, B5254T8 only
- Volvo V70 (2008–)2010–2011Engine B5254T10, B5254T11 only
- Volvo V70 (2008–)2012Engine B5254T10 only
What does this fault code mean?
The ECM receives information about the brake pedal position over the CAN network. The brake pedal switch status comes from the central electronics module (CEM), and the brake pedal position sensor status comes from the brake control module (BCM). The code is set when the signal from the CEM or the BCM is missing or faulty.
Possible causes
- Faulty brake pedal position sensor
- Faulty brake pedal switch
- Open circuit in the CAN network
What you can do
- 1Check that the fuses are intact
- 2If you have diagnostic equipment: read the CEM fault codes and deal with them first, then clear this code
- 3Check that the connectors at the brake pedal and the brake pedal position sensor are firmly seated and not corroded
- 4Use a multimeter to check that the CAN wires have no open circuit
- 5If the fault remains, have a workshop check the brake pedal position sensor and switch, as the brake system is involved
Symptoms you may notice2
- Automatic engine start does not happen
- Cruise control does not work at all
General guidance for car owners. Diagnosis on the car can point to a different cause.